[goodsamaritan]

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To employ perfect game theory you must be expert in both psychology/hand reading and mathematics.

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You are misunderstanding what it means to employ perfect game theory. A perfect game theory strategy is a strategy that is +EV or at worst 0 EV against any opponent and any playing style. A perfect game theory strategy does not take into account tells, psychology, or an opponents specific qualities. A perfect game theory strategy is designed to work against any and every opponent.

I think the source of your confusion is that you are conflating perfect game theory strategy with the strategy that maximizes EV. Against almost all human players, the EV maximizing strategy is not the perfect game theory strategy.

To take an extreme example, a person playing to maximize their EV would play very differently against complete maniac who pushes all in every hand than against an opponent who will only play with AA. However, a person playing the perfect game theory strategy would play the exact same strategy against both opponents.